Abstract: Rotating frame magnetic resonance based method and apparatus to measure and analyze flow properties in flowing complex fluids. The method consists on: 1) polarizing NMR active spins in a magnetic field region, 2) relaxing the plurality of individual macroscopic magnetizations in a second magnetic field region, wherein a plurality of radiofrequency pulses are irradiating said phases of said multiphasic fluid, wherein phase individual rotating frame relaxation times weight magnetization of said individual phases at said downstream end, wherein a plurality of contrast degrees between respective magnetization of individual phases, 3) measuring the total macroscopic magnetization in a third magnetic field region on an NMR measurement segment, and 4) reading the multidimensional data matrix with a tangible computer readable medium.

Abstract: Field cycling magnetic resonance based method and apparatus to measure and analyze flow properties in flowing complex fluids. The method consists on: 1) polarizing NMR active spins in a magnetic field region, 2) relaxing the plurality of individual macroscopic magnetizations in a second magnetic field region of variable intensity, 3) measuring the total macroscopic magnetization in a third magnetic field region on an NMR measurement module, and 4) reading the multidimensional data matrix with a tangible computer readable medium. The apparatus consists on: 1) a first magnet with constant magnetic field intensity, 2) a second magnet with a variable magnetic field intensity and time, 3) a third magnet having radio frequency antennas and field gradient coils (NMR module), and 4) a computing digital processor.

Abstract: A inventive flow-meter uses a measuring method which is based on the passage time of fluid molecules in a single sensor, without using any magnetic field gradient for the measurement of said fluid mean velocity. This method consists of the ultrafast irradiation of hydrogen nuclei from fluid molecules through pulses which are repeated every short time intervals, following a Carr-Purcell-Meiboom-Gill (CPMG) type sequence.

Abstract: An apparatus and a method is provided based on the Magnetic Resonance techniques to analyze and measure a uni- and/or a bi-directional flow regime of multiphase fluids in a transport and production conduct, in real time and flow-rates, based on a magnetic resonance analytical module, two magnetic prepolarization modules of variable effective length and a control computer of data acquisition and transfer, all associated to each other.

Abstract: A series of open-shape nuclear quadrupole resonance (NQR) sensors having environmental noise resilience and a capability for simultaneous independent multi-frequency operation is disclosed. The sensors are multimodal birdcage or TEM-type structures made from single-turn or multi-turn interconnected windows or magnetically coupled elements having uniform distributions of the amplitudes of the corresponding radiofrequency magnetic fields along their surfaces. The phases of these fields change in a cyclical fashion, such that the interference signals are picked up with opposite phases by different parts of the sensors and are, therefore, cancelled out. The devices may have a planar or a curved shape and may or may not be shielded on one side. Planar unshielded sensors may be used to simultaneously detect signals from objects positioned on both of their sides.